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SQL Ranking Functions
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SQL Ranking Functions

MediumSQL · PostgreSQL

Problem

Explain the difference between RANK(), DENSE_RANK(), and ROW_NUMBER() in SQL.

Use the provided employee scores to demonstrate how the three functions handle ties. Return each employee's score alongside all three ranking results.

Output

  1. One row per employee with employee_name, team, score, rank_position, dense_rank_position, and row_number_position
  2. Rank employees within their team by score from highest to lowest
  3. Order by team ascending, score descending, and employee_id ascending

Schema

employee_scores
ColumnTypeDescription
employee_idPKINTUnique employee score record identifier
employee_nameVARCHAR(100)Employee name
teamVARCHAR(50)Employee team
scoreINTEmployee performance score
Tablesemployee_scores
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CodePostgreSQL
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